73-80 Firewall Holes
 

Curious if I can get some help to label all the holes in the 73-80 firewall. I don't want to fill something I may need during assembly later on.

I'll update this posts as we can identify them.

1.-Dash Brace
2.-Throttle Pedal(3 hole cluster)
3.-Throttle cable(rectangular hole)
4.-Transmission kickdown grommet
5.-Tach grommet
6.-Dual Fuel Tank grommet
7.-Wiper Motor(larger hole + 3 mounting hole cluster)
8.-Wiring Harness Pass-through(square cut out + 2 mounting holes)
9.-Emergency Brake (2 hole cluster)
10.-Wiring grommet to cruise control, possibly other features
11.-Firewall insulation hold down

Not pictured or numbered is the e-brake cable exist which is in the bottom of the firewall, pointing straight down.

https://i.imgur.com/DBCbFzJ.png


I appreciate everyone's help to get this filled out.

Thanks :metal:

Re: 73-80 Firewall Holes
 

If number 3 is a square hole it looks to be the throttle cable.

Re: 73-80 Firewall Holes
 

it is. I hosted image to make it bigger/more clear.

Thanks

Re: 73-80 Firewall Holes
 

5 or 6 hood release cable hole if equipped ?

Re: 73-80 Firewall Holes
 

10 is cruise control on my 76. But its also used for other powered accessories in the engine compartment like dual battery etc. 11 is a firewall insulation hold down.

Re: 73-80 Firewall Holes
 

I dont think that was an option yet for '76...this cab is a '76 and didnt have a release cable.

:metal:

Re: 73-80 Firewall Holes
 

4 is for TH400 kickdown grommet, 5 can be for tach grommet. 6 I think is for dual tank grommet.

Re: 73-80 Firewall Holes
 

:metal:

Re: 73-80 Firewall Holes
 

Hi & thanks for posting the pic & info, very helpful! I do have a question about hole labeled #1. I have an 80 Jimmy that definitely has that hole, but nothing under the dash. Does anyone have a picture of the "Dash Brace" that's supposed to be there? Any help is much appreciated!

Scott